No signature of ejecta interaction with a stellar companion in three type Ia supernovae

Rob P. Olling (), Richard Mushotzky, Edward J. Shaya, Armin Rest, Peter M. Garnavich, Brad E. Tucker, Daniel Kasen, Steve Margheim and Alexei V. Filippenko
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Rob P. Olling: University of Maryland
Richard Mushotzky: University of Maryland
Edward J. Shaya: University of Maryland
Armin Rest: Space Telescope Science Institute
Peter M. Garnavich: University of Notre Dame
Brad E. Tucker: Mt Stromlo Observatory, The Australian National University
Daniel Kasen: University of California
Steve Margheim: Gemini Observatory, Southern Operations Center
Alexei V. Filippenko: University of California

Nature, 2015, vol. 521, issue 7552, 332-335

Abstract: The explosion of a type Ia supernova could be triggered either by accretion from a companion—which should be indicated by brightening caused by interaction of supernova ejecta with the companion—or by a merger with a white dwarf or other small star; here observations by the Kepler mission of three type Ia supernovae reveal no such brightening, leading to the conclusion that they were triggered by a merger.

Date: 2015
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DOI: 10.1038/nature14455

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